<?php
namespace Medienreaktor\Energize\ViewHelpers\Format;

/*
 * This is a copy of TYPO3\CMS\Fluid\ViewHelpers\Format\NumberViewHelper.php
 * Only change: Don't show decimals if there are only zeroes
 */

use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;

/**
 * Formats a number with custom precision, decimal point and grouped thousands.
 *
 * @see http://www.php.net/manual/en/function.number-format.php
 *
 * Examples
 * ========
 *
 * Defaults::
 *
 *    <f:format.number>423423.234</f:format.number>
 *
 * ``423,423.20``
 *
 * With all parameters::
 *
 *    <f:format.number decimals="1" decimalSeparator="," thousandsSeparator=".">423423.234</f:format.number>
 *
 * ``423.423,2``
 */
class NumberViewHelper extends AbstractViewHelper
{
    use CompileWithRenderStatic;

    /**
     * Output is escaped already. We must not escape children, to avoid double encoding.
     *
     * @var bool
     */
    protected $escapeChildren = false;

    /**
     * Initialize arguments.
     *
     * @throws \TYPO3Fluid\Fluid\Core\ViewHelper\Exception
     */
    public function initializeArguments(): void
    {
        $this->registerArgument('decimals', 'int', 'The number of digits after the decimal point', false, '2');
        $this->registerArgument('decimalSeparator', 'string', 'The decimal point character', false, '.');
        $this->registerArgument('thousandsSeparator', 'string', 'The character for grouping the thousand digits', false, ',');
    }

    /**
     * Format the numeric value as a number with grouped thousands, decimal point and
     * precision.
     *
     * @param array $arguments
     * @param \Closure $renderChildrenClosure
     * @param RenderingContextInterface $renderingContext
     *
     * @return string The formatted number
     */
    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
    {
        $decimals = $arguments['decimals'];
        $decimalSeparator = $arguments['decimalSeparator'];
        $thousandsSeparator = $arguments['thousandsSeparator'];

        $stringToFormat = $renderChildrenClosure();
        $formattedNumber = number_format($stringToFormat, $decimals, $decimalSeparator, $thousandsSeparator);

        // check decimals and remove them if they only contain zeroes
        if (!intval(explode($decimalSeparator, $formattedNumber)[1]))
            $formattedNumber = number_format($stringToFormat, 0, $decimalSeparator, $thousandsSeparator);

        return $formattedNumber;
    }
}